Swivel coupling



Patented Feb.. 13, 1923.

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RUDYARD K. IMHOLZ, OF PORTLAND, OREGON.

` SWIVEL Application filed November To all w/zom t may camera:

Be it hereby known that I, RUDYARD K. IMHOLZ, a citizen of the United States, and a resident of Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Swivel Coupling', of which the following is a specification.

This invention relates more particularly to means for attaching a hose to a pump, spray gun or other tool.

he objects of my invention are to provide an exceedingly simple and efficient means for preventing kinking in a hose, especially such as are used for high pressure spraying and for compressed air tools. A further object is torender the use of a spray gun or tool less dihicult by not requirmg the user to work against the twist which may be in a hose at the commencement of his work, or which may accumulate in the course of his operation.

Still further lobjects are to prevent the hose from kinliing sufficiently to entirely cut off the flow of its contents with resulting injury to the hose structure or to be blown loose from its connections resulting in a waste of materials or air in addition to the loss of time and inconvenience caused thereby.

I accomplish these results in the manner set forth in the following specification and illustrated in the accompanyingdrawing, in which:

Figure 1 is a sectional view through the device showing the manner in which it is attached to a spray gun. Figure 2 is a modified form of same shown in section. Figure 3 is an elevation from the hose end. Figure 4 is an elevation from the gun end. Figure 5 shows a modified form of the device.

Similar numbers of reference refer to the same or similar parts throughout the several views.

Referring in detail to the drawing, I have constructed my device of a tubular shell 10 provided with a threaded end l1 by means of which it is secured to the gun 12. A hexagonal section 13 is provided for tightening purposes. A hollow central stem 14 passes through the length of the member 10 and has a tapered head 15 which is ground in with the member 10. The portion 16 of the member 10 bears freely upon the stem 14, but the remaining section 17 provides considerable clearance. A slot 18 conferme.

7, 1921. Serial No. 513,304.

also provided in the spring 19 slightly and is held in place by screwing a hose fitting 23 as far as it will go upon the threaded portion 20. The shank 24 of the fitting 23 and the manner of securing the hose 25 to same is such asl is in common use in the art today. A hole 26 passes through the full length of the stem 14.

' device when position or angle of his tool he is permitted to do so by the tapered head 15 rotating' on its seat, and whereas the spring' 19 is merely strong enough to hold the head 15 against its seat finding lodgment therein, the pressure itself is depended upon to hold the head `firmly in place and prevent leakage without offering too great resistance against a turning moment.

In Figures 2, 3 and 4 I have illustrated a modification of this device which .is similar in every respect except that I employ a packing instead of a ground joint, and in order to permit its use I have threaded the tubular member 10A at the end 10B and used the straight stem 14A having a square shouldered head 15A. The member 10A is counterbored to the diameter 17 which space is filled with a packing' 17A upon which is placed a gland 16A which is forced against the packing' by the ring nut 16B which is preferably knurled.

rllhe `female hose coupling 24A may in either of these forms be securely locked to their stem by means of a lock nut 25B to prevent the fitting from backing ofi of the stem when not desired.

In Figure 5 I have illustrated another modification of the device shown in Figure 1 whose difference lies in the fact that I have provided a longer straight bearing for the stem 14, which stem is provided with grooves 27 which tend to accumulate moisture escaping past the ground joint and furnish additional safeguard against leakage.

I am aware that there are in existence various forms of swivel couplings such as are other objects are accomplished and in difground to a joint within saidv threaded end ferent manners: I therefore do not claim and having its opposite endthreaded and prosame broadly, but only Within the limits of jeoting from said tubular member, a spring the following claim. aro-und said projecting end, a sleeve shoul What claim is: dering against said spring and slipping The combination'ot1 a spray gun having over said tubular member, and a female 2t hose attached thereto With :L swivel couhose connection adapted to secure the pling interposed between Said gun and hose, threaded end of said stem to said hose and said coupling consisting of a tubular memhearing againstsaid .Sleeve in a. manner to ber adapted to be threaded into the spray Compress said spring. Y gun, a hollow stem hearing Within said tubu- RUDYARD K. IMHOLZ.

used with garden. hose and steam hose Where lar member and having a beveled 'head 

